​The author of Tattvārtharājavārttika was ________.

Correct option is B

The Tattvārtharājavārttika is a significant commentary on the Tattvārthasūtra, a foundational text of Jain philosophy. It was composed by the Jain scholar Vidyānanda (8th century CE). He belonged to the Digambara sect of Jainism and was an eminent logician and philosopher. His work explained and defended the philosophical positions of Jainism against rival schools such as the Buddhists and the Nyāya school. Vidyānanda Akalanka is regarded for integrating rigorous logic into Jain thought and advancing the scholastic traditions of Jainism. Thus, the correct answer is Vidyānanda Akalanka.

Information Booster:

Vidyānanda Akalanka: A profound Jain philosopher of the 8th century CE, Vidyānanda’s work, especially Tattvārtharājavārttika, holds critical importance for rituDigambara Jain philosophical thought. His style is marked by logical rigor and dialectical methods.

Additional knowledge:

Mādhava : A prominent Advaita Vedanta scholar, associated with works like Sarvadarśanasaṃgraha.
Haribhadra: A noted Svetambara Jain scholar known for Ṣaḍdarśanasamuccaya and Yogabindu.
Mahābodhi Viradhara : A Buddhist monk.